Alert archive / Alabama / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 22, NWS Huntsville, AL

April 30, 2003DeKalb County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Apr 30, 2003, 7:44 PM CDT for DeKalb County, Alabama. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 30, 2003, 7:44 PM CDT (00:44 UTC)
Expired: Apr 30, 2003, 8:15 PM CDT
In force: 31 min
Issued by: NWS Huntsville, AL
Area: Counties, with a storm outline in the text

County DeKalb County, AL

The radar

The Northeast Alabama radar (KHTX), 58 km from the middle of the area, began a volume at 00:47 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 0.7 hours before the alert went out and 171 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 320 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1793 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: -1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Huntsville, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 30, 2:30 PM CDT, 5 hours 14 minutes earlier.

Area forecast discussion, Apr 30, 2:30 PM CDT, 5 hours 14 minutes before

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Hazardous weather outlook, Apr 30, 1:00 PM CDT, 6 hours 44 minutes before

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In the hours before

Special weather statement, Apr 30, 6:30 PM CDT, 1 hour 14 minutes before

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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
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The office that day

Everything else NWS Huntsville, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 1, 3:50 PM CDT	Severe Thunderstorm Warning	HUN	Lauderdale	25 min
May 1, 4:09 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin	51 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2003 Every severe thunderstorm warning in 2003

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.